Dead app Shame at author. App is not worked correctly. All in bag and not repair. And not improved. Losted money...
Not bad All features correctly work.
System of repetitions (menu "Repetitions of words")
Words are copied to "repeat1.pdb" for the first repetition after the first learning. Then words are copied from "repeat1.pdb" to "repeat2.pdb" after the first repetition and etc.
You can set the total number of dictionaries for repetitions in the field "Repetitions".
The each dictionary have its own set of exercises for teaching. Check exercises to click button "levels".
Click button "start" for start of learning.